partial foreign export implementation, some fixes
add fast-build parameter
first try for passing profiling flags to cabal and ghcjs while booting
pass -fprof-auto to --ghcjs-options
make genCase working for StgSCC (ignoring SCC for now)
print a line when booting with profiling enabled
profile flag
add ccs field to closures (filled with curCCS for now)
WIP: SCC stuff and GetCurrentCCSOp/GetCCSOfOp primops